Massey Ferguson A.33.13 – Onboard diagnostic system / Hydraulic/Implement Controller: External Hydraulic Valve 3 Issue

A malfunction, restriction, or electrical connection problem associated with the third remote hydraulic spool valve, resulting in the implement attached to this valve being slow, weak, or completely unresponsive.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S

1. 1

   Inspect the wiring harness and connector at External Valve 3 for corrosion, loose pins, or damage.

2. 2

   Check the hydraulic fluid level and quality, and inspect for a blocked hydraulic/transmission filter.

3. 3

   Ensure the quick-disconnect couplers on Valve 3 are not damaged or blocked, and check hoses for internal collapse or external leaks.

4. 4

   Inspect the valve body for worn seals, damaged O-rings, or loose fittings that could cause a pressure drop.

1. 1

   Relieve Pressure

   Turn off the tractor and cycle the hydraulic controls to relieve all residual pressure in the system.

2. 2

   Clean the Area

   Thoroughly clean the rear remote valve stack to prevent dirt from contaminating the hydraulic system during disassembly.

3. 3

   Disconnect Electricals

   Unplug the electrical connector from the Valve 3 solenoid.

4. 4

   Remove Hoses/Lines

   Disconnect the hydraulic lines routed to the Valve 3 slice. Cap the lines immediately to prevent fluid loss and contamination.

5. 5

   Remove the Valve

   Unbolt the External Hydraulic Valve 3 from the main valve block assembly.

6. 6

   Repair or Replace

   If rebuilding, replace the internal O-rings and seals. If the solenoid or spool is heavily scored or electrically dead, replace the entire valve slice.

7. 7

   Reinstallation

   Install the new or repaired valve, torque the mounting bolts to OEM specifications, and reconnect the hydraulic lines and electrical harness.

8. 8

   Fluid and Filter Service

   Replace the hydraulic filter and top off the hydraulic fluid to the correct level.

9. 9

   Test and Clear Codes

   Start the tractor, test the remote valve for proper operation and leaks, and use a compatible diagnostic tool to clear the A.33.13 DTC from the system.